<?php
/**
 *
 *
 * @category     Shuxun Cms
 * @date         2015年11月4日
 * @author       Shuxun Team <kaiping.jiang@scshux.com>
 * @file         Uploader.php
 */
namespace  Scshux\Utils;
class Uploader
{

	protected  $lastError = null;


	public function  getLastError()
	{
		return $this->lastError;
	}

	/**
	 * 获取最大上传
	 */
	public static  function  getUploadMaxSize()
	{
		$upload_max_filesize = ini_get('upload_max_filesize');
		$post_max_size = ini_get('post_max_size');
		$min_upload_size = $upload_max_filesize > $post_max_size ? $post_max_size : $upload_max_filesize;
		return   $min_upload_size;
	}

	public  function  convertFiles($filesData)
	{
		if(!is_array($filesData['name'] )) return $filesData;

		$files = array();
		for ($key =0;$key<count($filesData['name']);$key++)
		{
			if(empty($filesData['name'][$key]))continue;

			$files[] = array(
					'name' => $filesData['name'][$key],
					'type' => $filesData['type'][$key],
					'tmp_name' => $filesData['tmp_name'][$key],
					'error' => $filesData['error'][$key],
					'size' => $filesData['size'][$key]
			);
		}
		return $files;
	}


	public function upload($fileData)
	{
		//文件保存目录路径
		$save_path = realpath(APPLICATION_PATH.'/../media').'/';
		//文件保存目录URL
		$save_url = '/media/';

		//定义允许上传的文件扩展名
		$ext_arr = array(
				'image' => array('gif', 'jpg', 'jpeg', 'png', 'bmp'),
				'flash' => array('swf', 'flv'),
				'media' => array('swf', 'flv', 'mp3', 'wav', 'wma', 'wmv', 'mid', 'avi', 'mpg', 'asf', 'rm', 'rmvb'),
				'file' => array('doc', 'docx', 'xls', 'xlsx', 'ppt', 'htm', 'html', 'txt', 'zip', 'rar', 'gz', 'bz2'),
		);
		//最大文件大小
		$max_size = 4000000;

		$save_path = realpath($save_path) . '/';

		$this->lastError = null;

		if($fileData['error']){
			switch($fileData['error']){
				case '1':
					$this->lastError = '超过php.ini允许的大小。';
					break;
				case '2':
					$this->lastError = '超过表单允许的大小。';
					break;
				case '3':
					$this->lastError = '图片只有部分被上传。';
					break;
				case '4':
					$this->lastError = '请选择图片。';
					break;
				case '6':
					$this->lastError = '找不到临时目录。';
					break;
				case '7':
					$this->lastError = '写文件到硬盘出错。';
					break;
				case '8':
					$this->lastError = 'File upload stopped by extension。';
					break;
				case '999':
				default:
					$this->lastError = '未知错误。';
			}
		}

		if (empty($_FILES) === false) {
			//原文件名
			$file_name = $fileData['name'];
			//服务器上临时文件名
			$tmp_name = $fileData['tmp_name'];
			//文件大小
			$file_size = $fileData['size'];
			//检查文件名
			if (!$file_name) {
				$this->lastError = '请选择文件。';
				return false;
			}
			//检查目录
			if (@is_dir($save_path) === false) {
				$this->lastError = '上传目录不存在。';
				return false;
			}
			//检查目录写权限
			if (@is_writable($save_path) === false) {
				$this->lastError = '上传目录没有写权限。';
				return false;
			}
			//检查是否已上传
			if (@is_uploaded_file($tmp_name) === false) {
				$this->lastError = '上传失败。';
				return false;
			}
			//检查文件大小
			if ($file_size > $max_size) {
				$this->lastError = '上传文件大小超过限制。';
				return false;
			}
			//检查目录名
			$dir_name = empty($_GET['dir']) ? 'image' : trim($_GET['dir']);
			if (empty($ext_arr[$dir_name])) {
				$this->lastError = '目录名不正确。';
				return false;
			}
			//获得文件扩展名
			$temp_arr = explode(".", $file_name);
			$file_ext = array_pop($temp_arr);
			$file_ext = trim($file_ext);
			$file_ext = strtolower($file_ext);
			//检查扩展名
			if (in_array($file_ext, $ext_arr[$dir_name]) === false) {
				$this->lastError = "上传文件扩展名是不允许的扩展名。\n只允许" . implode(",", $ext_arr[$dir_name]) . "格式。";
				return false;
			}
			//创建文件夹
			if ($dir_name !== '') {
				$save_path .= $dir_name . "/";
				$save_url .= $dir_name . "/";
				if (!file_exists($save_path)) {
					mkdir($save_path,0777,true);
				}
			}
			$ymd = date("Ymd");
			$save_path .= $ymd . "/";
			$save_url .= $ymd . "/";
			if (!file_exists($save_path)) {
				mkdir($save_path);
			}
			//新文件名
			$new_file_name = date("YmdHis") . '_' . rand(10000, 99999) . '.' . $file_ext;
			//移动文件
			$file_path = $save_path . $new_file_name;
			if (move_uploaded_file($tmp_name, $file_path) === false) {
				$this->lastError = '上传文件失败。';
				return false;
			}
			@chmod($file_path, 0644);
			$file_url = $save_url . $new_file_name;
			return $file_url;
		}
		return  false;
	}
}